Make OmniboxEditModel::UpdatePermanentText() fetch the new text itself rather

chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.h"
 
 #include <Carbon/Carbon.h>  // kVK_Return
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/string_util.h"
@@ skipping 184 matching lines @@
     // store existing state before anyone tries to setup the new
     // state.  Anyhow, it would look something like this.
 #if 0
     [[field_ window] makeFirstResponder:field_];
     [[field_ currentEditor] setSelectedRange:state->selection];
 #endif
   }
 }
 
 void OmniboxViewMac::Update() {
-  if (model()->UpdatePermanentText(
-      controller()->GetToolbarModel()->GetText(true))) {
+  if (model()->UpdatePermanentText()) {
     // Restore everything to the baseline look.
     RevertAll();
 
     // TODO(shess): Figure out how this case is used, to make sure
     // we're getting the selection and popup right.
   } else {
     // TODO(shess): This corresponds to _win and _gtk, except those
     // guard it with a test for whether the security level changed.
     // But AFAICT, that can only change if the text changed, and that
     // code compares the toolbar model security level with the local
@@ skipping 724 matching lines @@
 
 NSUInteger OmniboxViewMac::GetTextLength() const {
   return [field_ currentEditor] ?  [[[field_ currentEditor] string] length] :
                                    [[field_ stringValue] length];
 }
 
 bool OmniboxViewMac::IsCaretAtEnd() const {
   const NSRange selection = GetSelectedRange();
   return NSMaxRange(selection) == GetTextLength();
 }